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24 RPT 301 User Manual
K177 Issue No. 3
The calibration routine requires a minimum of two pressures within the
operating extremes (maximum of six pressures). The instrument
software calculates an offset and gain correction to be applied to all
subsequent readings using a statistical best straight line method.
For single point calibration, the gain factor is set to unity.
Notes
1 For the pressure sensor to rapidly respond to the applied pressure,
disable the filter by sending the filter command F, 0,0<CR>.
2 Before sending the ‘C’ command set the instrument to operate in the
pressure measurement units required for calibration. i.e. U, 0<CR>
selects mbar. Always use the same units when entering applied
pressures.
Command: C, PIN
Reply: APPLY PRESSURE nn
apply pressure, when steady send <CT>
Reply: ENTER APPLIED PRESSURE nn
type pressure value - decimal number followed by
<CT>
Reply: MORE? (Y/N)
type Y <CT> to calibrate more points
or
type N <CT> to complete calibration point entry
Reply (if N): SLOPE XX INTERSECT YY
ACCEPT CALIBRATION (Y/N)
type Y <CT>
to accept and permanently update the calibration
or
type N <CT> to terminate without saving
Reply (if N): CALIBRATION TERMINATED
end of calibration procedure
Reply (if Y): ENTER CAL DATE
type date in the format DD/MM/YY
Reply: CALIBRATION COMPLETE
Where:nn = pressure point 1-6